INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values (4277, 'EPSG', 4277, '+proj=longlat +ellps=airy +nadgrids=OSTN15_NTv2_OSGBtoETRS.gsb +no_defs +type=crs', 'GEOGCS["OSGB36",DATUM["Ordnance_Survey_of_Great_Britain_1936",SPHEROID["Airy 1830",6377563.396,299.3249646],EXTENSION["PROJ4_GRIDS","OSTN15_NTv2_OSGBtoETRS.gsb"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4277"]]');